STUDY ON A METHOD TO IDENTIFY EXTERNAL FORCES AND DAMPING PARAMETERS OF STRUCTURE FROM RANDOM RESPONSE VALUES

摘要

Proposed in this paper is a method of identifying external forces and damping parameters of structure from random response values. This method estimates external forces acting on structure from response values by means of the inverse procedure of response analysis in the frequency range. An appropriate value of the damping parameter is identified by investigating the spectrum of external force for various damping parameters. This is very effective in cases of involving analyzing aerodynamic vibration tests in wind tunnels and field measurements of real structure vibration. The advantage of this method over other methods is that it can more accurately identify damping parameters even with less data.